----How is your grandmother? ----She____ for many years.
—Do you know where David is? I couldn't find him anywhere. —Well, he ______ have gone far—his coat's still here.
She is getting better, but it will be some time ______ she is completely well.
The computer centre, ______ last year, is very popular among the students in this school.
______ in thought, he almost ran into the car in front of him.
—What did your parents think about your decision? —They always let me do ______ I think I should.